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- W2067991202 abstract "Abstract We present a sample of 16 radio galaxies, each of which is characterized by a wide, elongated emission gap with fairly sharp and straight edges between the two radio lobes. This particular subset of the “superdisk” radio galaxies is chosen because of a highly asymmetric location of the host elliptical galaxy relative to the gap’s central axis. In addition to posing a considerable challenge to the existing models, such a morphology also means that the two jets traverse highly unequal distances through the superdisk material. One thus has a possibility to directly investigate if the marked asymmetry between the two jets’ interaction with the (much denser) ambient medium, during their propagation, has a significant import for the brightness of the hot spot forming near each jet’s extremity. We also propose a new explanation for the formation of superdisks through the merger of a smaller elliptical galaxy with the massive host, in which the gas attached to the infalling galaxy deposits its angular momentum into the host’s circumgalactic gas, thereby causing it to flatten into a fat pancake, or superdisk. The asymmetric location of the host galaxy can be assisted by the kick imparted to it during the merger. We also suggest a physical link between these radio galaxies and those with X-shaped and Z-symmetric radio lobes, commonly believed to arise from mergers of two galactic nuclei, each harboring a supermassive black hole." @default.
- W2067991202 created "2016-06-24" @default.
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- W2067991202 date "2009-01-01" @default.
- W2067991202 modified "2023-09-23" @default.
- W2067991202 title "Superdisks and the structural asymmetry of radio galaxies" @default.
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- W2067991202 doi "https://doi.org/10.1016/j.newast.2008.05.004" @default.
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